Divide gesture events by dpi scale if IsDIPEnabled().

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index 474ba1c264619349bbc375817c59ade9710f0b9e..02fbab4ea0c4e2a357c4f0a9bbdde0489906fef8 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -232,9 +232,9 @@ class ContentViewCoreImpl : public ContentViewCore,
 
   int GetTouchPadding();
 
-  void SendGestureEvent(WebKit::WebInputEvent::Type type, long time_ms,
-                        int x, int y);
-
+  float DpiScale() const;
+  WebKit::WebGestureEvent MakeGestureEvent(WebKit::WebInputEvent::Type type,
+                                           long time_ms, int x, int y) const;
   struct JavaObject;
   JavaObject* java_object_;
 
@@ -250,6 +250,8 @@ class ContentViewCoreImpl : public ContentViewCore,
   // Whether the renderer backing this ContentViewCore has crashed.
   bool tab_crashed_;
 
+  float dpi_scale_;
+
   // The owning window that has a hold of main application activity.
   ui::WindowAndroid* window_android_;